Investor Presentaiton
r
Gross Margin (1)
A Diversified Electric and Gas Utility
Rate Base by Service Territory
Natural
Gas
21%
3,000
($Millions)
2,773
Total Rate Base
Electric
2,500
79%
2,334
4,500
4,031
4,000
3,412
Authorized Rate Base
3,500
Customers
Commercial
16%
2,000
Industrial
& Other
1%
1,500
Estimated Rate Base
$ Millions
3,000
2,500
2,000
1,500
Residential
83%
1,000
1,000
500
627
557
516
500
430
Gross Margin
(1)
90
115
South
Nebraska
Dakota
1%
15%
Montana
Electric
Montana
Natural Gas
South Dakota
Electric
So. Dakota/
Nebraska
Natural Gas
Montana
84%
Data as reported in our 2020 10-K
NorthWestern's '80/20' rules:
Approximately 80% Electric, 80% Residential and 80% Montana.
Over $4.0 billion of rate base investment to serve our customers
(1) Gross Margin, defined as revenues less cost of sales, is a non-GAAP Measure. See appendix for additional disclosure.
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